package collection;

import java.util.ArrayList;
import java.util.Collection;

public class CollectionDemo4 {
    public static void main(String[] args) {
        Collection c1 = new ArrayList();
        c1.add("java");
        c1.add("c++");
        c1.add(".net");

        Collection c2 = new ArrayList();
        c2.add("android");
        c2.add("ios");
        c2.add("java");
        System.out.println("c2:"+c2);

        c1.addAll(c2);//将c2加到c1中
        System.out.println("c1:"+c1);
        System.out.println("c2:"+c2);

        Collection c3 = new ArrayList();
        c3.add("c++");
        c3.add("android");
        c3.add("php");
        System.out.println("c3="+c3);

        boolean contains = c1.containsAll(c3);//判断c1中是否包含c3中的所有元素
        System.out.println("是否包含:"+contains);//false

        /*
        //取交集
        c1.retainAll(c3);
        System.out.println("c1:"+c1);
        System.out.println("c3:"+c3);
        */

        //删交集
        c1.removeAll(c3);
        System.out.println("c1:"+c1);
        System.out.println("c3:"+c3);

    }
}
